Added ActionBar, its documentation and icons
Added with_previous property to ActionPrevious
Added Bug Fixes
Corrected kivy image. Added '.png' to the file path
Reduced Size of action_item.png, action_view.png and textinput.png to make only one default theme image
Merge branch 'actionbar' of https://github.com/abhijangda/kivy into abhijangda-actionbar
wip
FBO depth rendering changed to use teexture
small cleanup
Use GL_DEPTH_COMPONENT16
uix:ScrollView show bars only when viewport is scrollable. closes #1386
Simplify StackLayout's do_layout.
Merge pull request #1390 from Ian-Foote/stacklayout_823

Simplify StackLayout's do_layout.
Merge pull request #1387 from kivy/scrollview_hide

uix:ScrollView show bars only when viewport is scrollable. closes #1386
actionbar: remake styling by forcing the height of the actionbar, add ActionButton.icon, prefer icon usage instead of text when the button is not in a group, and various size fixes on images and button/icon.
merge actionbar
actionbar: update example
actionbar: doesnt use Config directly as default value.
actionbar: fix versionadded
doc: grammatical improvements to core/text/__init__.py